Gondwana consisted of which current continents?
A)South America, Africa, Australia, Antarctica, and India
B)Africa, South America, Antarctica, and Australia
C)South America, Africa, India, and Australia
D)South Africa, India, Africa, and Australia
E)South America, Central America, and India
A
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In bioturbation, most of the original sedimentary structures are preserved
a. True
b. FalseHigh levels of ____ could indicate life on other planets
a. free nitrogen b. carbon dioxide c. free oxygen d. methane e. ozone
The principal advantage of the Universal Soil Loss Equation is
A) ease of use and ability to evaluate the potential impact of conservation practices B) rapid estimation of soil erosion at every location in a site of interest C) ready estimation of reservoir siltation D) prediction of the amount of nutrient loading in a stream adjacent a farm field
Which is an example of an organ system?
A. the compartments that make up the liver and control its function B. lungs taking in oxygen C. the brain, spinal cord, and nerves working together for one purpose D. the lining of the intestine